Perkins 1103D XK Systems Operation Testing And Adjusting page 26

26
Testing and Adjusting Section
Illustration 16
Setting the valve lash
(1) Adjustment screw
(A) Angled Feeler gauge
Valve Lash Adjustment
Accidental engine starting can cause injury or
death to personnel.
To prevent accidental engine starting, turn the ig-
nition switch to the OFF position, place a do not
operate tag at the ignition switch location and dis-
connect and tape the electrical connection to the
stop solenoid that is located on the fuel injection
pump.
Table 5
Inlet Valves
Valve Lash 0.2 ± 0.05 mm
(0.008 ± 0.002
inch)
Firing Order
(1) The No. 1 Cylinder is at the front of the engine.
1. Remove the valve mechanism cover. Refer to
Disassembly and Assembly, "Valve Mechanism
Cover - Remove and Install".
This document has been printed from SPI². Not for Resale
g01227408
Exhaust Valves
0.45 ± 0.05 mm
(0.018 ± 0.0020 inch)
1-2-3
(1)
2. Rotate the crankshaft in a clockwise direction that
is viewed from the front of the engine. When the
inlet valve of the No 1 cylinder has opened and
the exhaust valve of the No 1 cylinder has not
completely closed measure the valve lash of the
inlet valve of No 2 cylinder and the exhaust valve
of No 3 cylinder. If necessary, make adjustment.
a. Lightly tap the rocker arm at the top of the
adjustment screw with a soft mallet. This
will ensure that the lifter seats against the
camshaft.
b. Loosen the valve adjustment screw locknut
that is on adjustment screw (1).
c. Place Tooling (A) between the rocker arm and
the valve. Turn adjustment screw (1) while the
valve adjustment screw locknut is being held
from turning. Adjust the valve lash until the
correct specification is achieved.
d. Tighten the adjustment locknut to a torque of
27 N·m (20 lb ft). Do not allow the adjustment
screw to turn while you are tightening the
adjustment locknut. Recheck the valve lash
after tightening the adjustment locknut.
3. Rotate the crankshaft in a clockwise direction that
is viewed from the front of the engine. When the
inlet valve of the No 2 cylinder has opened and
the exhaust valve of the No 2 cylinder has not
completely closed measure the valve lash of the
inlet valve for No 3 cylinder and the exhaust valve
for No 1 cylinder.
If adjustment is necessary, refer to Step 2.
4. Rotate the crankshaft in a clockwise direction that
is viewed from the front of the engine. When the
inlet valve of the No 3 cylinder has opened and
the exhaust valve of the No 3 cylinder has not
completely closed measure the valve lash of the
inlet valve for No 1 cylinder and the exhaust valve
for No 2 cylinder.
If adjustment is necessary, refer to Step 2.
5. Install the valve mechanism cover. Refer to
Disassembly and Assembly, "Valve Mechanism
Cover - Remove and Install".
KENR6912